I was thinking this too
TVs and monitors use rec709 and can only display 7 stops from black to white. You can't force a display to produce more range than that.
Unless what YouTube is planning is some sort of faux-HDR, which gives the impression of more range.
I've always thought Black Swan would be excellent to re-cut without the psychological elements, pose it as a positive film about a girl that nails her dream job.